Minco B216681 Miniature Temperature Sensors
Instructions: Intrinsic Safety and Increased Safety
1. Description
These temperature sensors are designed for installation in various locations. They feature an operating temperature range of -60°C to +200°C (with limitations for specific cable types). Models are available with resistance temperature detector (RTD) or thermocouple elements, supporting 2-, 3-, or 4-wire measurement circuits and single or dual elements. Accessories such as feedthroughs and various springs/rings are available. Some case styles include a babbitt layer.
2. Attestation of Conformity
The Minco B216681 Miniature Temperature Sensors are in conformity with ATEX Directive 2014/34/EU and various harmonized standards including EN IEC 60079-0, EN 60079-7, EN 60079-11, IEC 60079-0, IEC 60079-7, IEC 60079-11, IEC 61508-2, CAN/CSA C22.2 No. 60079-0, CAN/CSA C22.2 No. 60079-7, CAN/CSA C22.2 No. 60079-11, CAN/CSA C22.2 No. 61010-1, ANSI/UL 60079-0, ANSI/UL 60079-7, ANSI/UL 60079-11, ANSI/UL 61010-1, and National Electrical Code NFPA 70 Article 500. Additional certifications include Canadian Electrical Code CSA C22.1 Annex J, Petroleum & Explosives Safety Organisation (PESO) Petroleum Rules 2002, Korea Protective Device Safety Certification, and CCC China GB/T 3836 standards. Certificates from SIRA, IECEx, and CSA are also listed.
3. Installation Instructions
Separate installation instructions are provided with each sensor. These can also be downloaded from the Minco website. Specific instructions are available for Case Styles A, B, C, and D, detailing the appropriate methods for installation. Feedthrough accessories are automatically included with certain case style B sensors. Installation should only be performed by trained personnel familiar with protection types, installation practices, and relevant regulations.
4. Special Conditions for Safe Use
These sensors are rated for Intrinsic Safety and Increased Safety and can be used in potentially explosive atmospheres. Users must select the appropriate protection mode on the marking label. The electrical parameters of associated equipment must not exceed specified limits (Uo ≤ 30 V, Io ≤ 46 mA, Po ≤ 0.4 W). For North America, power must be from a Class 2 source. Installation requires adherence to relevant electrical codes (Canadian Electrical Code, National Electrical Code). Ambient temperature must be respected. For Intrinsic Safety installations, the apparatus must connect only to certified associated intrinsic safety equipment with compatible parameters. Cable connections require an enclosure with a minimum IP20 protection degree.
5. Entity Parameters and Electrical Data
The following table details the entity parameters and electrical data for both S (RTD) and TC (Thermocouple) models across various protection modes:
| Parameter | S models | TC models |
| Maximum input voltage Ui (or Vmax) | 30 V | 30 V |
| Maximum input power Pi (or Pmax) | 0.40 W | n/a |
| Maximum input current li (or Imax) | 46 mA | 46 mA |
For intrinsic safety, cable parameters are specified: Ci_max = 0.028µF/m, Li_max = 0.0013mH/m, Ri_max = 0.16 Ω/m.
6. Temperature Class Tables
The temperature class rating is determined by ambient temperature and dissipated power. The tables below show maximum temperatures for different power dissipation levels and classes (T6 to T2) for both S (RTD) and TC (Thermocouple) sensors. Note that elastomer-filled cables and feedthroughs have specific limitations for T3 and T2 temperature classes.
| Power dissipated in the S(RTD) sensor | Maximum Temperature | ||||
| Class T6 | Class T5 | Class T4 | Class T3** | Class T2*** | |
| 0.1 W | +70°C | 85°C | 120°C | 185°C | 200°C |
| 0.2 W | +65°C | 80°C | 115°C | 180°C | 200°C |
| 0.4 W | +50°C | 65°C | 100°C | 165°C | 200°C |
| Power dissipated in the TC(thermocouple) sensor | Maximum Temperature | ||||
| Class T6 | Class T5 | Class T4 | Class T3** | Class T2*** | |
| 0.1 W | +70°C | 85°C | 120°C | 185°C | 200°C |
**Elastomer-filled cables should not be used for T3 temperature class applications. Feedthroughs should not be used on T3 temperature class applications where ambient temperature exceeds +85°C (or +135°C on special orders).
***Elastomer-filled cables and feedthroughs should not be used on T2 temperature class applications.
7. Electrical Connections
Wiring diagrams and color codes for S models (2-lead, 3-lead, 4-lead) and TC models (Type E, J, K, T) are provided. Minco's standard color codes are shown, with the note that alternatives can be used and should be verified against the model specification drawing.
8. Block Diagram
A block diagram illustrates the intrinsic safety protection mode, showing the connection between a hazardous (classified) location and a safe (unclassified) location. It details the required entity parameters for associated apparatus, including voltage, current, and power limits, as well as capacitance and inductance requirements.
9. Marking Examples
Examples of marking labels for ATEX/IECEx/North America and KCs/PESO/CCC (China) certifications are shown. These labels indicate the manufacturer, model, batch number, operating temperature range, and relevant safety certifications. Users are instructed to check the box corresponding to the selected protection mode on the marking label.
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